(Original post by hassi94)
You want x^2 - 4.5x on the LHS. So this is the same as writing (x-2.25)^2 + an adjustment. (x-2.25)^2 = x^ - 4.5x + 5.0625 so our 'adjustment' must be -5.0625 to cancel it out.

Sweet, yeah I get it now. Was a small error, cheers. And thanks Raheem. To the other two users, arrogance won't get you far in life.